Guided spiral catheter

A spiral catheter apparatus and method of use for access to, and laser or other treatment within, cavities and organs in the human body, the apparatus having a spiral member with a selected curvilinear shape, but flexible enough to assume a temporarily elongated shape such that the spiral member can be extended through the vasculature in the temporarily elongated shape and will assume the selected curvilinear shape when extended into a body cavity or organ, the spiral member formed of a superelastic or other material, the selected curvilinear shape serving to securely position the spiral member adjacent a selected surface within the body cavity or organ for laser or other treatment with a laser delivery device or other functional device on a selected surface, the apparatus further having a main catheter shaft with at least two hollow lumens extending therethrough, the first lumen for slidably guiding the main catheter shaft over the spiral member into a first position adjacent the selected surface, and the second lumen having a guide hole adjacent the distal end of the main catheter shaft for advancing a laser delivery device or other functional device through the guide hole for laser or other treatment on the selected surface within the body cavity or organ.

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Claims

1. A catheter device for treating a body, the device comprising:

a treatment device;
a flexible preformed guide wire having a proximal end and a distal end, the distal end has a changeable curvilinear shape that initially has a straightened form during introduction into the body, and subsequently transforms into a conformal spiraI shape within a body cavity; and
a flexible catheter shaft having a proximal end and a distal end and at least two lumens extending axially therethrough, the guide wire is slidably disposed within the catheter shaft and extendable out of a first lumen a guide hole at the catheter shaft's distal end communicates with a second lumen, the treatment device is slideably disposed within the second lumen and extendable through the guide hole to selectable treatment sites such that the catheter shaft is adapted to advance along the guide wire while transformed in the conformal spiral shape,
whereby the conformal spiral shape of the guide wire provides: i) a predetermined spiral treatment locus for the selectable treatment sites and ii) stabilizes the catheter device.

2. The device of claim 1 wherein the guide wire is formed at least partially from a material selected from the goup consisting of superelastic material and shape memory material.

3. The device of claim 1 further including advance means for controlling advancement of the treatment device through the second lumen.

4. The device of claim 3 further including a means for holding the catheter device's proximal end.

5. The device of claim 1 further including a depth stop means for limiting advancement of the treatment device through the second lumen.

6. The device of claim 5 further including a means for holding the catheter device's proximal end.

7. The device of claim 1 further including fluid seal means for preventing fluid flow through the catheter shaft's proximal end.

8. The device of claim 1 wherein the second lumen's guide hole is oriented in a direction substantially parallel to the guide wife's axial direction.

9. The device of claim 1 wherein the second lumen's guide hole is oriented in an offset direction to the guide wire's axial direction by a formed surface.

10. The device of claim 1 wherein the treatment device is a laser energy delivery device with a distal end having at least one optical fiber.

11. The device of claim 10 wherein the at least one optical fiber's distal end has a focusing device.

12. The device of claim 1 further including a piercing means for mechanically piercing a tissue surface.

13. The device of claim 12 wherein the piercing means is attached to the distal tip of the catheter shaft.

14. The device of claim 12 wherein the piercing means is the treatment device which is an laser energy delivery device whose optical fiber's distal end forms the piercing means.

15. The device of claim 1 further including a guide catheter disposed around the catheter device.

16. A method of positioning a catheter device in a human body for treatment at a selectable treatment site, the method comprising the steps of:

a) providing a catheter device that includes a treatment device, a flexible preformed guide wire having a proximal end and a distal end, the distal end has a changeable curvilinear shape that initially has a straightened form during introduction into the body, and subsequently transforms into a conformal spiral shape within a body cavity, and a flexible catheter shaft having a proximal end and a distal end and at least two lumens extending axially therethrough, the guide wire is slidably disposed within the catheter shaft and extendable out of a first lumen, a guide hole at the catheter shaft's distal end communicates with a second lumen, the treatment device is slideably disposed within the second lumen and extendable through the guide hole;
b) positioning the guide wire's distal portion in the body cavity so that the changeable curvilinear shape transforms into the conformal spiral shape, the guide wire's distal portion is adjacent a first spiral treatment sufface within the body cavity;
c) moving the catheter shaft on the guide wire to a first selected site; and
d) advancing the treatment device's distal end through the guide hole to the first selected site and treating the first selected site.

17. The method of claim 16 further including the following steps:

e) retracting the treatment device's distal end into the guide hole;
f) re-positioning the catheter shaft into a second spiral treatment surface within the body cavity adjacent to the first spiral treatment surface within the body cavity by moving the catheter shaft over the guide wire; and
g) advancing the treatment device's distal end through the guide hole to a second selected site and treating the second selected site.

18. The method of claim 16 wherein the body surface being treated is an endocardial surface within the heart's left ventricle.

19. The method of claim 16 wherein treatment is myocardial revascularization and the treatment device is a laser energy delivery device.

20. The method of claim 16 wherein treatment is myocardial revascularization and the treatment surface is a heart's endocardial surface within a left ventricle, the method further including the step of advancing the distal end of the treatment device through the endocardial surface into the heart's myocardium while simultaneously delivering laser energy.

21. The method of claim 20 wherein the step of advancing the laser energy delivery device into myocardium while simultaneously delivering laser energy is preceded by a step of piercing the endocardial surface with the laser energy delivery device's distal end.

22. The method of claim 16 wherein treatment is myocardial revasculaxization and the treatment surface is a heart's endocardial surface within a left ventricle and the treatment device is a laser energy delivery device, the method further including the steps of advancing the distal end of the treatment device through the endocardial surface into the heart's myocardium and subsequently retracting the laser energy delivery device from the heart's myocardium while simultaneously delivering laser energy.

Referenced Cited

U.S. Patent Documents

4669465 June 2, 1987 Moore et al.
4846171 July 11, 1989 Kauphausman et al.
4917102 April 17, 1990 Miller et al.
5054501 October 8, 1991 Chattani et al.
5345940 September 13, 1994 Seword et al.
5542434 August 6, 1996 Imran et al.
5632734 May 27, 1997 Golel et al.
5656028 August 12, 1997 Swartz et al.

Foreign Patent Documents

0 515 867 A2 December 1992 EPX
WO 6/35469 A1 November 1996 WOX

Patent History

Patent number: 5730741
Type: Grant
Filed: Feb 7, 1997
Date of Patent: Mar 24, 1998
Assignee: Eclipse Surgical Technologies, Inc. (Sunnyvale, CA)
Inventors: Michael Horzewski (Santa Clara, CA), Jeffrey Giba (Sunnyvale, CA)
Primary Examiner: Francis Jaworski
Attorney, Agent or Firm: Ray K. Shahani, Janet Kaiser Castaneda
Application Number: 8/796,636

Classifications

Current U.S. Class: Instruments (606/1); Flexible Catheter Guide (600/585); 604/281; With Optical Fiber (606/15)
International Classification: A61B 1700; A61B 500; A61M 2501;